The 13th edition of the NollywoodWeek Film Festival is back in Paris, with a theme of "Voyage", taking audiences to Nigeria and beyond. It's an industry worth over $6 billion and growing fast, but it's also at a turning point, caught between global expansion and the pressures of streaming, technology and who gets to tell its stories. Serge Noukoué, co-founder of the NollywoodWeek Film Festival, spoke to us in Perspective.